#变量和命名
cars=100
space_in_a_car=4.0
drivers=30
passengers=90
cars_not_driven=cars-drivers
cars_driven=drivers
carpool_capacity=cars_driven*space_in_a_car
average_passengers_per_car=passengers/cars_driven


print("There are",cars,"cars available.")
print("There are only",drivers,"driners available.")
print("There will be",cars_not_driven,"empty cars today.")
print("We can transportt",carpool_capacity,"people today.")
print("We have",passengers,"to carpool today.")
print("We need to put about",average_passengers_per_car,"in each car.")
input()
